How to Limit the Creation of Revisions on Released Parts to just the Leader?

Hi,

My customer (On Cloud) would like to ensure that only Leaders have the ability to Revise Released Parts. They are okay with having Non-Leaders make Revisions on parts that are In Work and Frozen, but want to limit who can revise Released parts.

I found a setting in Permission Rules that sets what Maturity States are allowed for a New Revision (image), but nothing specific to what the customer is asking for. It would be nice to see another choice level to select who (Author, Leader, etc.) can create a new revision under each maturity state.

This may fall into some kind of Data Setup setting - just a guess.

Any help or ideas are welcome. Thank you.